| Subject | English | Spanish |
| comp., MS | application single-threaded apartment | contenedor uniproceso de aplicación (A single-threaded apartment the thread of which is the core UI thread for an application window) |
| gen. | single application for assistance | solicitud única de ayuda |
| immigr., empl. | single application procedure | procedimiento único de solicitud |
| gen. | Working Party on the Application of the Single Act | Grupo de trabajo sobre la aplicación del Acta Única |